Heart Anatomy and Function Quiz

Where is the heart located?

• Inferior to the diaphragm

• Superior to the diaphragm and near the midline of the thoracic cavity

• In the abdominal cavity

• In the cranial cavity

What is the outermost layer of the heart wall called?

• Myocardium

• Endocardium

• Epicardium

• Pericardium

Which chamber of the heart receives oxygenated blood from the lungs?

• Right atrium

• Left atrium

• Right ventricle

• Left ventricle

What is the function of the atrioventricular (AV) valves?

• To prevent backflow of blood into the atria

• To prevent backflow of blood into the ventricles

• To regulate blood pressure

• To transport oxygen

Which valve is located between the left atrium and the left ventricle?

• Tricuspid valve

• Pulmonary semilunar valve

• Aortic semilunar valve

• Bicuspid (mitral) valve

What is the role of the sinoatrial (SA) node in heart conduction?

• To delay the impulse to allow the atria to contract

• To initiate the heartbeat and set the pace

• To conduct the impulse to the ventricles

• To regulate blood flow

Which structure in the heart conduction system is known as the "pacemaker"?

• Atrioventricular (AV) node

• Purkinje fibers

• Sinoatrial (SA) node

• Bundle of His

What happens during ventricular systole?

• The ventricles relax and fill with blood

• The atria contract and push blood into the ventricles

• The ventricles contract and push blood into the aorta and pulmonary trunk

• The semilunar valves close

Which condition is characterized by a rapid, uncoordinated shuddering of the heart muscle?

• Fibrillation

• Tachycardia

• Bradycardia

• Heart block

What is the formula for cardiac output (CO)?

• CO = HR + SV

• CO = HR - SV

• CO = HR x SV

• CO = HR / SV